CN219913049U - Gradually-expanding injection full-premixing water-cooling combustor - Google Patents

Abstract

The utility model discloses a divergent injection full-premix water-cooling burner, which comprises a burner body, wherein the burner body comprises an air inlet pipe, an air inlet is formed in the air inlet pipe, a divergent premix box is fixedly connected in the air inlet pipe, a gas nozzle is fixedly connected to the upstream end of the divergent premix box, a premix chamber is fixedly connected to one end of the divergent premix box, which is far away from the gas nozzle, the air inlet, the gas nozzle, the divergent premix box and the premix chamber are communicated with each other, a gas main pipe is communicated with the gas nozzle, a diffusion chamber is fixedly connected to one end of the premix chamber, which is far away from the gas nozzle, and the premix chamber is communicated with the diffusion chamber; the water cooling device comprises a water cooling pipe row, two ends of the water cooling pipe row are communicated with an upper water cooling pipe row header and a lower water cooling pipe row header, the upper water cooling pipe row header is communicated with a water outlet pipe, and the lower water cooling pipe row header is communicated with a water inlet pipe. The utility model ensures that the premixed gas is uniformly mixed and distributed, the combustion of the combustible gas is more stable, and the generation of nitrogen oxides is reduced.

Description

Gradually-expanding injection full-premixing water-cooling combustor

Technical Field

The utility model relates to the technical field of combustors, in particular to a divergent injection full-premix water-cooling combustor.

Background

With the gradual deterioration of the ecological environment, prevention of atmospheric pollution has been eager. The ultralow nitrogen combustion technology is a new technology which is widely applied to realizing ultralow nitrogen emission in the current market. However, the existing burner has the problems that the mixing device is large in size, uniform mixing is difficult to realize, flame temperature in the combustion process is high, a combustion head is easy to burn out, nitrogen oxide is high in emission, backfire and deflagration are easy to generate, stable combustion cannot be achieved, and the like, so that the gradually-expanding injection full-premix water-cooling burner is provided for solving the problems.

Disclosure of Invention

The utility model aims to provide a divergent injection full-premix water-cooling burner, which solves the problems in the prior art, ensures that premixed gas is uniformly mixed and distributed, is not easy to generate tempering deflagration, reduces the flame temperature in the combustion process, reduces the generation of nitrogen oxides, and ensures that the combustion is more stable.

In order to achieve the above object, the present utility model provides the following solutions: the utility model provides a divergent injection full premix water-cooled burner, comprising:

the burner comprises a burner body, wherein the burner body comprises an air inlet pipe, an air inlet is formed in the air inlet pipe, a gradually-expanding type premixing box is fixedly connected in the air inlet pipe, a gas nozzle is fixedly connected to the upstream end of the gradually-expanding type premixing box, a premixing chamber is fixedly connected to one end of the gradually-expanding type premixing box, which is far away from the gas nozzle, the air inlet, the gas nozzle, the gradually-expanding type premixing box and the premixing chamber are mutually communicated, a gas main pipe is communicated with the gas nozzle, a diffusion chamber is fixedly connected to one end of the premixing chamber, which is far away from the gas nozzle, and the premixing chamber is communicated with the diffusion chamber;

the water cooling device comprises a water cooling pipe row, wherein two ends of the water cooling pipe row are communicated with an upper water cooling pipe row header and a lower water cooling pipe row header, the upper water cooling pipe row header is communicated with a water outlet pipe, and the lower water cooling pipe row header is communicated with a water inlet pipe.

Preferably, the gas nozzle comprises an annular sleeve and a plurality of gas branch pipes, the annular sleeve comprises an annular sleeve inner wall and an annular sleeve outer wall, the gas branch pipes are fixedly connected with the annular sleeve inner wall and the annular sleeve outer wall, a gas channel is formed by a cavity between the annular sleeve inner wall and the annular sleeve outer wall, the gas channel is communicated with the gas branch pipes, the gas branch pipes extend out of the gas inlet pipe, the gas branch pipes are fixedly connected and communicated with the gas main pipe, the gas outlet direction of the gas branch pipes faces the downstream direction of the gas inlet pipe, a plurality of partition plates are fixedly connected between the annular sleeve inner wall and the annular sleeve outer wall, a plurality of sealing plates are fixedly connected between two adjacent gas branch pipes, and the sealing plates are positioned in the gas inlet pipe.

Preferably, a louver cyclone is fixedly connected in the premixing chamber.

Preferably, the water-cooling tube row comprises a plurality of water-cooling tubes, the water-cooling tubes are fixedly connected to the diffusion chamber, two ends of each water-cooling tube are respectively communicated with the upper header of the water-cooling tube row and the lower header of the water-cooling tube row, a ventilation plate is fixedly connected between two adjacent water-cooling tubes, and a plurality of air holes are formed in the ventilation plate.

Preferably, the ventilation plate comprises an air inlet orifice plate and a flow guide orifice plate, the air inlet orifice plate and the flow guide orifice plate are positioned on two sides of the water cooling pipe, the air holes comprise a first air inlet hole and a second air inlet hole, the first air inlet hole is formed in the flow guide orifice plate, and the second air inlet hole is formed in the air inlet orifice plate.

The utility model discloses the following technical effects: in the device, air enters an air inlet pipe through an air inlet, combustible gas flows from a gas main pipe to a gas nozzle and is sprayed out, the gas nozzle sprays high-pressure combustible gas, the air and the combustible gas are mixed in a gradual expansion type premixing box and a premixing chamber, the mixed gas enters a diffusion chamber and then passes through a water-cooling pipe row to be ignited and combusted by an ignition device, the mixed gas is combusted on the surface of the water-cooling pipe row, water enters a water-cooling pipe row lower header from a water inlet pipe, absorbs heat in the water-cooling pipe row, reduces the temperature of combustion flame, achieves stable combustion, reduces the generation of nitrogen oxides, and hot water flows into an upper header of the water-cooling pipe row and flows out from a water outlet pipe. The utility model ensures that the premixed gas is uniformly mixed and distributed, the combustion of the combustible gas is more stable, and the generation of nitrogen oxides is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a divergent injection full premix water-cooled burner in the present utility model;

FIG. 2 is a cross-sectional view A-A of FIG. 1;

FIG. 3 is a top view of the present utility model;

FIG. 4 is an enlarged view of a portion of B in FIG. 3;

FIG. 5 is a schematic view of a plate-shaped flow-guiding orifice plate according to the present utility model;

FIG. 6 is a schematic view of a V-shaped water-cooled tube bank according to the present utility model;

FIG. 7 is a side view of a V-shaped water-cooled tube bank according to the present utility model;

FIG. 8 is a schematic view of a cylindrical water-cooled tube bank according to the present utility model;

FIG. 9 is a side view of a cylindrical water-cooled tube row according to the present utility model;

1, an air inlet; 2. a fuel gas branch pipe; 3. an annular sleeve; 4. a gas main pipe; 5. a gas outlet; 6. a gradual expansion type premixing box; 7. a premix chamber; 8. a louvered cyclone; 9. a diffusion chamber; 10. a water outlet pipe; 11. the water-cooling tube row is provided with a header; 12. a water-cooling tube row; 13. a water-cooling pipe row lower header; 14. a water inlet pipe; 15. a partition plate; 16. an annular sleeve inner wall; 17. an annular sleeve outer wall; 18. a sealing plate; 19. an air inlet orifice; 20. a second air inlet hole; 21. a gas channel; 22. a first air inlet hole; 23. a diversion pore plate; 24. a water-cooled tube; 25. and an air inlet pipe.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description.

Referring to fig. 1-4, the utility model provides a divergent injection full premix water-cooled burner, comprising:

the burner body comprises an air inlet pipe 25, an air inlet 1 is formed in the air inlet pipe 25, a divergent type premixing box 6 is fixedly connected in the air inlet pipe 25, a gas nozzle is fixedly connected to the upstream end of the divergent type premixing box 6, a premixing chamber 7 is fixedly connected to one end, away from the gas nozzle, of the divergent type premixing box 6, the air inlet 1, the gas nozzle, the divergent type premixing box 6 and the premixing chamber 7 are mutually communicated, the gas nozzle is communicated with a gas main pipe 4, a diffusion chamber 9 is fixedly connected to one end, away from the gas nozzle, of the premixing chamber 7, and the premixing chamber 7 is communicated with the diffusion chamber 9;

the water cooling device comprises a water cooling pipe row 12, wherein the two ends of the water cooling pipe row 12 are communicated with a water cooling pipe row upper header 11 and a water cooling pipe row lower header 13, the water cooling pipe row upper header 11 is communicated with a water outlet pipe 10, and the water cooling pipe row lower header 13 is communicated with a water inlet pipe 14.

The air enters the air inlet pipe 25 through the air inlet 1, the combustible gas flows from the gas main pipe 4 to the gas nozzle and is sprayed out, the gas nozzle sprays high-pressure combustible gas, the air and the combustible gas are mixed in the gradual expansion type premixing box 6 and the premixing chamber 7, the flow rate of the high-pressure combustible gas in the gradual expansion type premixing box 6 is reduced, the high-pressure combustible gas can stay in the premixing chamber 7 for a longer time, so that the mixing is more uniform, the mixed gas enters the diffusion chamber 9 and then passes through the water cooling pipe row 12 to reach a hearth (not shown in the figure), the mixed gas is ignited and combusted by the ignition device, the mixed gas is combusted on the surface of the water cooling pipe row 12, water enters the water cooling pipe row lower header 13 from the water inlet pipe 14, heat is absorbed in the water cooling pipe row 12, the temperature of combustion flame is reduced, stable combustion is achieved, the generation of nitrogen oxides is reduced, the hot water flows into the water cooling pipe row upper header 11, and flows out from the water outlet pipe 10.

Further optimizing scheme, the gas nozzle includes annular sleeve 3 and a plurality of gas are in charge of 2, annular sleeve 3 includes annular sleeve inner wall 16 and annular sleeve outer wall 17, gas is in charge of 2 and annular sleeve inner wall 16 and annular sleeve outer wall 17 fixed connection, cavity formation gas passageway between annular sleeve inner wall 16 and the annular sleeve outer wall 17, gas passageway and gas are in charge of 2 intercommunication, gas is in charge of 2 and stretches out intake pipe 25, gas is in charge of 2 and gas house steward 4 fixed connection and intercommunication, the direction of giving vent to anger of gas is in charge of 2 is towards intake pipe 25 downstream direction, fixedly connected with a plurality of baffles 15 between annular sleeve inner wall 16 and the annular sleeve outer wall 17, fixedly connected with a plurality of closing plates 18 between the two adjacent gas are in charge of 2, closing plate 18 is located intake pipe 25.

The combustible gas enters the gas branch pipe 2 from the gas main pipe 4 and then enters the gas channel between the annular sleeve inner wall 16 and the annular sleeve outer wall 17 from the gas branch pipe 2, the partition plate 15 divides the gas channel into independent channels, the gas outlet end of the gas channel is the gas outlet 5, the gas outlet 5 is in a flat mouth shape, air enters from the air inlet 1, the sealing plate 18 only enables the air to pass through the annular sleeve inner wall 16, the sealing plate 18, the gas branch pipe 2 and the annular sleeve inner wall 16 form a tapered structure, the air flow speed is accelerated after the air passes through the annular sleeve inner wall 16, the pressure is reduced, high-pressure gas is sprayed out from the gas outlet 5 at the same time, the pressure energy is converted into kinetic energy, the pressure is reduced, and the low-pressure area is formed in the premixing chamber 7, and due to the existence of the low-pressure area, the air which does not enter the premixing chamber 7 is sucked in and mixed in the premixing chamber 7.

According to a further optimization scheme, a louver swirler 8 is fixedly connected in the premixing chamber 7.

The mixed gas passes through the louver swirler 8 and then enters the diffusion chamber 9 for full mixing.

Further optimizing scheme, water-cooling tube bank 12 includes a plurality of water-cooling tubes 24, and water-cooling tube 24 fixed connection is on diffusion room 9, and water-cooling tube 24 both ends respectively with water-cooling tube bank upper header 11 and water-cooling tube bank lower header 13 intercommunication, fixedly connected with ventilative board between the two adjacent water-cooling tube 24, offered a plurality of gas pockets on the ventilative board.

The water cooling pipe 24 is filled with water, the mixed gas reaches a hearth (not shown in the figure) through air holes, and the mixed gas is ignited and burnt by an ignition device, and burns on the surface of the water cooling pipe 24, so that heat exchange can be performed.

Further optimizing scheme, the air-permeable plate includes air inlet orifice 19 and water conservancy diversion orifice 23, and air inlet orifice 19 and water conservancy diversion orifice 23 are located water cooling pipe 24 both sides, and the gas pocket includes first inlet port 22 and second inlet port 20, and first inlet port 22 is seted up on water conservancy diversion orifice 23, and second inlet port 20 is seted up on air inlet orifice 19.

The air channel 21 is arranged between the air inlet orifice 19 and the diversion orifice 23, mixed gas enters the air channel 21 through the first air inlet hole 22, then passes through the second air inlet hole 20 to be sprayed into a hearth (not shown in the figure), the mixed gas is ignited and combusted through the ignition device, surface combustion is formed on the surface of the water cooling tube bank 12, the heat exchange temperature of flame through the water cooling tube 24 is reduced, stable combustion is achieved, the generation of nitrogen oxides is reduced, and meanwhile, the effect of cooling the diversion orifice 23 and the air inlet orifice 19 is also achieved.

The working principle of the device is as follows: air from a blower (not shown) enters an air inlet pipe 25 through an air inlet 1, after passing through an annular sleeve inner wall 16, the air flow speed is accelerated, the pressure is reduced, high-pressure fuel gas is sprayed out from a fuel gas channel between the annular sleeve inner wall 16 and an annular sleeve outer wall 17, pressure energy is converted into kinetic energy, the pressure is reduced, a low-pressure area is formed in a premixing chamber 7, air which does not enter the premixing chamber 7 is sucked into the premixing chamber 7 due to the existence of the low-pressure area and mixed in the premixing chamber 7, the mixed gas enters a diffusion chamber 9 through a louver swirler 8 to be fully mixed and converted into kinetic energy to be pressure energy, the mixed gas continuously flows forwards to flow through a diversion orifice plate 23 to flow into a first air inlet hole 22, then enters a second air inlet hole 20 through a gas channel 21 to be sprayed into a hearth to be ignited and combusted through an ignition device, surface combustion is formed on the surface of a water cooling tube row 12, the flame is reduced in heat exchange temperature to achieve stable combustion, and the effect of cooling the diversion orifice plate 23 and the air inlet orifice plate 19 is also played.

The device has the advantages that:

1. the design of the louver swirler 8 plays a role in flow equalization and backfire prevention, and meanwhile, after the premixed gas passes through, a backflow area is formed again in the diffusion area, so that the mixing is more uniform.

2. The diffuser 9 is designed to reduce the flow rate and increase the pressure of the premixed gas so that the premixed gas can be smoothly ignited.

3. The design of the gas branch pipe 2, the sealing plate 18 and the annular sleeve 3 forms a tapered structure, the flow speed of air after passing is increased, the pressure is reduced, and a low-pressure area is formed in the premixing chamber to play a role in drainage, so that the gas is uniformly mixed.

4. The gradually-expanding premix tank 6 is designed to be gradually-expanding, and the structure can reduce the flow speed of the gas, raise the pressure, form backflow, ensure that the gas stays in the premix chamber 7 for a long time to be mixed more uniformly, and also reduce the size of the premix chamber.

5. The gas main pipe 4 and the gas branch pipes 2 are arranged in a ring shape, so that the gas distribution can be more uniform.

6. The water-cooling tube row 12 can reduce the temperature of flame, reduce the generation of nitrogen oxides and make flame combustion more stable.

In this embodiment, the flow-guiding orifice plate 23 is V-shaped as shown in fig. 4, and in other embodiments, the flow-guiding orifice plate 23 may also be flat as shown in fig. 5.

In this embodiment, the water-cooled tube row 12 may be in a V shape as shown in fig. 1, and in other embodiments, the water-cooled tube row 12 may be in a cylindrical arrangement as shown in fig. 6 and 7, as shown in fig. 8 and 9.

In the description of the present utility model, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

The above embodiments are only illustrative of the preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model, and various modifications and improvements made by those skilled in the art to the technical solutions of the present utility model should fall within the protection scope defined by the claims of the present utility model without departing from the design spirit of the present utility model.

Claims (5)

1. The utility model provides a full premix water-cooling combustor is penetrated in diverging formula, its characterized in that includes:

the burner comprises a burner body, wherein the burner body comprises an air inlet pipe (25), an air inlet (1) is arranged on the air inlet pipe (25), a divergent premix box (6) is fixedly connected in the air inlet pipe (25), a gas nozzle is fixedly connected to the upstream end of the divergent premix box (6), a premix chamber (7) is fixedly connected to one end of the divergent premix box (6) away from the gas nozzle, the air inlet (1), the gas nozzle, the divergent premix box (6) and the premix chamber (7) are mutually communicated, a gas main pipe (4) is communicated with the gas nozzle, a diffusion chamber (9) is fixedly connected to one end of the premix chamber (7) away from the gas nozzle, and the premix chamber (7) is communicated with the diffusion chamber (9);

the water cooling device comprises a water cooling pipe row (12), wherein two ends of the water cooling pipe row (12) are communicated with an upper water cooling pipe row header (11) and a lower water cooling pipe row header (13), an upper water cooling pipe row header (11) is communicated with a water outlet pipe (10), and a lower water cooling pipe row header (13) is communicated with a water inlet pipe (14).

2. The divergent injection full premix water-cooled burner of claim 1, wherein: the gas nozzle comprises an annular sleeve (3) and a plurality of gas branch pipes (2), the annular sleeve (3) comprises an annular sleeve inner wall (16) and an annular sleeve outer wall (17), the gas branch pipes (2) are fixedly connected with the annular sleeve inner wall (16) and the annular sleeve outer wall (17), a gas channel is formed by a cavity between the annular sleeve inner wall (16) and the annular sleeve outer wall (17), the gas channel is communicated with the gas branch pipes (2), the gas branch pipes (2) extend out of the gas inlet pipe (25), the gas branch pipes (2) are fixedly connected and communicated with the gas manifold (4), the gas outlet direction of the gas branch pipes (2) faces the downstream direction of the gas inlet pipe (25), a plurality of partition plates (15) are fixedly connected between the annular sleeve inner wall (16) and the annular sleeve outer wall (17), a plurality of sealing plates (18) are fixedly connected between two adjacent gas branch pipes (2), and the sealing plates (18) are located in the gas inlet pipe (25).

3. The divergent injection full premix water-cooled burner of claim 2, wherein: the premixing chamber (7) is fixedly connected with a shutter cyclone (8).

4. The divergent injection full premix water-cooled burner of claim 1, wherein: the water cooling pipe row (12) comprises a plurality of water cooling pipes (24), the water cooling pipes (24) are fixedly connected to the diffusion chamber (9), two ends of each water cooling pipe (24) are respectively communicated with the upper header (11) of the water cooling pipe row and the lower header (13) of the water cooling pipe row, two adjacent water cooling pipes (24) are fixedly connected with ventilation plates, and a plurality of air holes are formed in the ventilation plates.

5. The divergent injection full premix water-cooled burner of claim 4, wherein: the ventilation plate comprises an air inlet orifice plate (19) and a flow guide orifice plate (23), the air inlet orifice plate (19) and the flow guide orifice plate (23) are positioned on two sides of the water cooling pipe (24), the air holes comprise a first air inlet hole (22) and a second air inlet hole (20), the first air inlet hole (22) is formed in the flow guide orifice plate (23), and the second air inlet hole (20) is formed in the air inlet orifice plate (19).